function checkname(){
	var nameValue=document.getElementById('signinname').value
	var nameLen=nameValue.length;
	if(nameLen<2||nameLen>6){
		alert('名字长度应为2~6个汉字');
		document.getElementById('signinname').focus();
		return false;
	}
	var result=nameValue.match(/^[\u4e00-\u9fa5]+$/);
	if(result==null){
		window.alert("用户名只能为汉字!");
		document.getElementById('signinname').value="";
		document.getElementById('signinname').focus();
		return false;
	}
	return true;
}